Harry Potter stars have turned out at the red carpet opening of a studio tour which gives fans a spell-binding behind-the-scenes glimpse of the blockbuster film series.

Rupert Grint, Tom Felton and Bonnie Wright were among the actors at the grand opening of the Warner Brothers Studio Tour - The Making of Harry Potter.

Hundreds of screaming Potter fans lined up outside the studios in Leavesden, near Watford, Hertfordshire, where all eight of the multimillion pound-grossing films inspired by JK Rowling's magical stories were shot.

Local boy Grint - Ron Weasley in the Potter films - said: "This is the most glamorous I have ever seen Watford. It's exciting for everyone to see.

"There are so many memories from in there and to share them with everyone is great. There are so many highlights but the model of the castle is out of this world."

The 23-year-old added that he had sneaked out some mementos for himself, including the number from Harry's door in Privet Drive. He said: "You can buy them from most DIY stores, and they've replaced it now."

The three-hour walking tour's attractions include the original Great Hall of Hogwarts School, built for Harry Potter And The Philosopher's Stone.

The hall features graffiti by Hogwarts' pupils, solid oak and pine house tables which were built for the films, and York stone flooring laid more than 11 years ago.

Some of the most iconic sets include Dumbledore's office, Diagon Alley, the Ministry of Magic, 4 Privet Drive, the Gryffindor common room and the Weasley kitchen.

Felton, who played Draco Malfoy, said: "It's hard to sum it all up in a sentence but I will never forget walking through the Great Hall for the first time. It was just as magical now as it was all those years ago."